
intLoading();

//加载状态为complete时移除loading效果
function completeLoading() {
	if (document.readyState == "complete") {
		var loadingMask = document.getElementById('loadingDiv');
		loadingMask.parentNode.removeChild(loadingMask);
	}
}

//正在加载请稍後
function intLoading(){
	//获取浏览器页面可见高度和宽度
	var _PageHeight = document.documentElement.clientHeight,
	_PageWidth = document.documentElement.clientWidth;
	//计算loading框距离顶部和左部的距离（loading框的宽度为215px，高度为61px）
	var _LoadingTop = _PageHeight > 61 ? (_PageHeight - 61) / 2 : 0,
	_LoadingLeft = _PageWidth > 215 ? (_PageWidth - 215) / 2 : 0;
	//加载gif地址
	var Loadimagerul = ctx + "style/web/images/loading.gif";
	//在页面未加载完毕之前显示的loading Html自定义内容
	var _LoadingHtml = '<div id="loadingDiv" style="position:absolute;left:0;width:100%;height:' + _PageHeight + 'px;top:0;background:#f3f8ff;opacity:1;filter:alpha(opacity=80);z-index:10000;"><div style="position: absolute; cursor1: wait; left: ' + _LoadingLeft + 'px; top:' + _LoadingTop + 'px; width:150px;; height: 50px; line-height: 50px; padding-left: 50px; padding-right: 5px; background: #fff url('+Loadimagerul+') no-repeat scroll 5px 12px; border: 2px solid #95B8E7; color: #696969; font-family:\'Microsoft YaHei\';">正在处理，请稍后...</div></div>';
	//呈现loading效果
	document.write(_LoadingHtml);
	//监听加载状态改变
	document.onreadystatechange = completeLoading;	
}